The Primordial Abundance of Deuterium From a Metal-Poor Damped Lyman Alpha System

Details The Primordial Abundance of Deuterium From a Metal-Poor Damped Lyman Alpha System The Primordial Abundance of Deuterium From a Metal-Poor Damped Lyman Alpha System

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7334p&link_type=abstract

HST Proposal ID #7334

Physics

Hst Proposal Id #7334 Quasar Absorption Lines

Scientific paper

We propose that the chances of measuring D/H reliably are greatly enhanced by targeting selected damped Ly-alpha systems of low metallicity; this strategy circumvents many of the uncertainties which affect previous attempts at measuring D/H. In particular, with our method it will be possible to detect D absorption in many Lyman series lines and the chance of contamination by interloper H clouds is reduced by a factor of > 150. A 21-hour exposure with STIS---requiring a 31 orbit allocation---will allow us the measure D/H to better than 30 percent.

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